The Ori power generator is the power source of Ori warships. Located in a massive room, the power generator is reached via a single walkway from the door. When activated, the power generator shoots energy up from its center, which presumably heads into the large ring situated in Ori battlecruisers. The power generator uses Zero point energy, making it a variant of the Ancient Zero Point Module, though a lot larger[1]. The core contains enough energy that - if detonated - would take the entire ship with it, as Adria comments offhand that she saved Daniel and Vala's lives when she prevented C-4 from doing just that. (SG1: "Counterstrike")